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Hi Everyone, Has anyone here had any first hand experience with the Chinese Knock Off Weber 45 DCOE carbs. I would like to hear from someone who has them fitted to a 260Z L28 engine. Preferably anyone who has them running well. I have a set on my L28 but they will not idle correctly. This is a fully reconditioned L28 with a 60 thou overbore. Standard cam, reconditioned N42 standard head head and block. Flat top pistons. All new timing chain, gears, guides, and tensioner. Set on position 1. 1. I have checked and rechecked the timing several times and it is absolutely correct. Currently set at 12 degrees advance. 2. Checked and rechecked the valve clearances and they are absolutely correct as per the book. 3. New points correctly set. New condenser. 4. Mixture set using a Colourtune spark Plug (nice blue flames in the chamber) 5. Re-Jetted the idle jets from 55F8 to 50F8. Made slight improvement but still wont idle below 1850 rpm. This is with the butterflies fully closed. 6.Some backfiring through the carbys. Re-jeting improved this but not fully sorted. 7. Engine starts dieseling when ignition switched off. 8. Fuel pump is Carter P4070. Fuel Regulator set at 2.5 psi. Any more and the carbs flood. I've tried to check the actual pressure but it will not read on the 0-15 psi gauge. Is running a fuel return line to the tank. 9. Float levels are set at 12mm. Checked and rechecked. If anyone can suggest what else I can try short of chucking the JASF Weber knock offs and fitting genuine Webers help would be greatly appreciated. Best Regardsw, Champ 54